"We can't say for sure that it is or it isn't; it appears that it isn't," Officer Ricardo Hernandez of the LAPD Media Relations Office tells PEOPLE.
Hernandez says that the knife is still being tested by the LAPD forensics team. "More tests are going to have to be conducted before we can determine if that was the weapon used," he says.
A law enforcement official told the Associated Press on Wednesday that the knife, allegedly found some time after Simpson's acquittal, is a common tool used by gardeners and that it was too small to make the wounds that killed the pair.
Mark J. Terrill / AP; Inset: Getty
A construction worker allegedly gave the knife to a retired Los Angeles Police Department motor officer who was working near the Rockingham property in 2001, the officer's lawyer previously told PEOPLE.
"It was an old, dirty, rusted knife," the attorney said of the five-inch fixed blade buck knife.
According to the attorney, the officer, George Maycott, Maycott took the knife and immediately picked up the phone and called the West LA Division of the LAPD. But Maycott's lawyer said he was told, "We don’t want to have anything to do with this. O.J. Simpson has been acquitted. There is double jeopardy. Even if that knife had blood all over it there is nothing we can do."
The knife remained in the former officer's toolbox for more than a decade until last month when his friend advised him to report the tool to police.
Reporting by JEFF TRUESDELL